We all got to the bomb site, The Doctor and Jack uncovered the space craft while the woman, Nancy and I stood by. "You see? Just an ambulance," Jack said. "That's an ambulance?" Nancy asked. "It's hard to explain. It's from another world," I replied.

"They've been trying to get in," Jack said. "Of course they have. They think they've got their hands on Hitler's latest secret weapon," The Doctor said and Jack started to press buttons, making The Doctor frown, "What're you doing?"

"The sooner you see this thing is empty, the sooner you'll know I had nothing to do with it," Jack said and started to open the ship before it sparked. "Didn't happen last time."

"It hadn't crashed last time. There'll be emergency protocols," The Doctor said. "Doctor, what is that?" I asked before the patients from the hospital started banging at the doors. "Doctor," I said. "Captain, secure those gates," The Doctor said. "Why?" Jack asked. "Just do it! Nancy, how'd you get in here?" The Doctor asked. "I cut the wire," Nancy said.

"Show Sam. Setting two thousand four hundred and twenty eight D," The Doctor said and he tossed me the Sonic Screwdriver. "What?" I asked. "Reattaches barbed wire. Go!" He said and I ran off with Nancy.

I used the Sonic Screwdriver on the bard wire while Nancy stood behind me. "Who are you?" She asked, "Who are any of you?"

"You'd never believe me if I told you," I said. "You just told me that was an ambulance from another world," She pointed out, "There are people running around with gas mask heads calling for their mummies, and the sky's full of Germans dropping bombs on me. Tell me, do you think there's anything left I couldn't believe?"

I looked at her, "We're time travellers from the future," I replied. "Mad, you are," She said as her eyes grew wide. "We have a time travel machine," I said, "Seriously."

"It's not that. All right, you've got a time travel machine. I believe you. Believe anything, me. But what future?" Nancy asked. "Nancy, this isn't the end," I informed, "I know how it looks, but it's not the end of the world or anything."

"How can you say that? Look at it," She said. "Listen to me. I've lived in this city since I was 6. I'll live here, in like, 50 years time," I said. "You'll live here?" She asked in surprise. "Yes," I said.

She shook her head, "But, but you're not . . ." She trailed off. "What?" I asked. "German," She said. "Nancy, the Germans don't come here. They don't win. Don't tell anyone I told you so, but you know what? You win," I said softly. "We win?" She repeated in surprise and amazement. I nodded before grabbing her hand, "Come on."

We ran back to The Doctor and Jack to see they were still at the ship. "It's empty. Look at it," Jack said. "What do you expect in a Chula medical transporter? Bandages? Cough drops?" The Doctor listed before turning to me, "Sam."

"I don't know," I said. "Yes, you do," He said, staring at me. I frowned as I thought before my eyes grew wide, "Nanogenes," I replied. He nodded before turning to Jack, "It wasn't empty, Captain. There was enough nanogenes in there to rebuild a species."

"Oh, God," Jack said. "Getting it now, are we?" The Doctor said, "When the ship crashes, the nanogenes escape. Billions upon billions of them, ready to fix all the cuts and bruises in the whole world. But what they find first is a dead child, probably killed earlier that night, and wearing a gasmask." I frowned, "And they brought him back to life? They can do that?" I asked.

"What's life? Life's easy," The Doctor said, "A quirk of matter. Nature's way of keeping meat fresh. Nothing to a nanogene. One problem, though." He turned to Jack, "These nanogenes, they're not like the ones on your ship. This lot have never seen a human being before. Don't know what a human being's supposed to look like. All they've got to go on is one little body, and there's not a lot left. But they carry right on. They do what they're programmed to do. They patch it up. Can't tell what's gasmask and what's skull, but they do their best. Then off they fly, off they go, work to be done. Because, you see, now they think they know what people should look like, and it's time to fix all the rest. And they won't ever stop. They won't ever, ever stop. The entire human race is going to be torn down and rebuilt in the form of one terrified child looking for its mother, and nothing in the world can stop it!"

"I didn't know," Jack said before The Doctor got to work on the ambulance. "Sam!" Nancy called and I turned around to walk over to her. We watched as the gas mask patients were approaching us. "Oh god," I breathed out before rushing back towards The Doctor, "It's bringing the gas mask people here, isn't it?"

"The ship thinks it's under attack. It's calling up the troops. Standard protocol," He said. "The gas mask people aren't troops," I said. "They are now. This is a battle-field ambulance. The nanogenes don't just fix you up, they get you ready for the front line. Equip you, programme you," He said. "That's why the child's so strong. Why it could do that phoning thing," I realized.

"It's a fully equipped Chula warrior, yes. All that weapons tech in the hands of a hysterical four year old looking for his mummy. And now there's an army of them," The Doctor said. The patients surround us from outside the barbed wire. "Why don't they attack?" Jack asked. "Good little soldiers, waiting for their commander," The Doctor said.

"The child?" Jack asked. "Jamie," Nancy said. "What?" He asked. "Not the child. Jamie," She said. "How long until the bomb falls?" I asked Jack. "Any second," He replied. "What's the matter, Captain? A bit close to the volcano for you?" The Doctor asked.

"He's just a little boy," Nancy said. "I know," The Doctor said. "He's just a little boy who wants his mummy," She said. "I know. There isn't a little boy born who wouldn't tear the world apart to save his mummy. And this little boy can," He said. "What're we going to do?" I asked. "I don't know," He said.

"It's my fault," Nancy said. "No," The Doctor said. "It is. It's all my fault," She said. "How can it be your -"

"Mummy."

"Mummy."

"Mummy."

"Mummy."

We all looked over at the patients as they kept repeating the same word. The Doctor looked at Nancy, "Nancy, what age are you? 20? 21? Older than you look, yes?"

A bomb landed close to us and I turned to The Doctor, "Doctor, that bomb. We've got seconds," Jack spoke. "Can't you teleport us out?" I asked him. "Not you guys. The nav-com's back online. Going to take too long to override the protocols," He said.

"So it's volcano day. Do what you've got to do," The Doctor said. "Jack?" I asked, hoping he wouldn't. He looked at me for a moment before he was teleported to his ship.

"How old were you five years ago? 15? 16?" The Doctor asked Nancy, "Old enough to give birth, anyway. He's not your brother, is he? A teenage single mother in 1941. So you hid. You lied. You even lied to him."

The gate opened and the child, Jamie stood there. "Are you my mummy?" He asked. "He's going to keep asking, Nancy. He's never going to stop," The Doctor told Nancy. "Mummy?" Jamie asked.

"Tell him. Nancy, the future of the human race is in your hands. Trust me and tell him," The Doctor said. Nancy and Jamie walked towards each other and stopped when they faced each other. "Are you my mummy?" Jamie asked, "Are you my mummy? Are you my mummy?"

"Yes. Yes, I am your mummy. I'm here," Nancy said as her voice broke. Jamie walked closer to her and she kneeled down to the ground. "Are you my mummy?" Jamie repeated. "Yes," She said. "Are you my mummy?" He repeated again. "He doesn't understand," The Doctor said, "There's not enough of him left."

"I am your mummy. I will always be your mummy. I'm so sorry. I am so, so sorry," Nancy said and she hugged Jamie, and nanograms started to surround them. "What's happening?" I asked, "Doctor, it's changing her, we -"

"No, it okay," I cut me off, "Come on, please. Come on, you clever little nanogenes. Figure it out! The mother, she's the mother. It's got to be enough information. Figure it out."

"What's happening?" I asked. "See? Recognising the same DNA," The Doctor said. Jamie let go of Nancy and she fell to the ground. The Doctor and I ran over to her. "Oh, come on. Give me a day like this. Give me this one," He said as I kneeled down to help Nancy.

The Doctor took off Jamie's gas mask to show that Jamie was normal. "Ha-ha! Welcome back!" The Doctor said with a grin before taking Jamie into his arms, "Twenty years till pop music you're going to love it."

"What happened?" Nancy asked. "The nanogenes recognised the superior information, the parent DNA. They didn't change you because you changed them! Ha-ha!" The Doctor said, laughing before putting Jamie back on the ground, "Mother knows best!"

"Oh, Jamie," Nancy said and she hugged Jamie. "Doctor, that bomb," I said. "Taken care of it," The Doctor said. "How?" I asked. "Psychology," He replied.

Just as the bomb was hurtling towards us, it was caught by a blue light. Jack. "Doctor!" Jack called. "Good lad!" The Doctor said. "The bomb's already commenced detonation. I've put it in stasis but it won't last long," Jack said.

"Change of plan. Don't need the bomb. Can you get rid of it, safely as you can?" The Doctor said. "Sam," Jack said. "Yeah?" I asked. "Goodbye. By the way, love the t-shirt," He said and he disappeared back into his ship with the bomb, and flew off.

Nanogenes were around The Doctor's hands and I frowned. "What are you doing?" I asked. "Software patch. Going to email the upgrade. You want moves, Sam? I'll give you moves," The Doctor said.

He tossed the nanograms over to the gas mask remaining patients and they all fell to the ground. "Everybody lives, Sam. Just this once, everybody lives," He said. All the patients got up as their normal selves and The Doctor ran over to one of them. They exchanged a few words before The Doctor ran back over to me, "Right, you lot. Lots to do. Beat the Germans, save the world. Don't forget the welfare state! Setting this to self-destruct, soon as everybody's clear. History says there was an explosion here. Who am I to argue with history?"

"Usually the first in line," I joked with a smirk. He laughed, "Let's go," He said and we both went back to the TARDIS. "The nanogenes will clean up the mess and switch themselves off, because I just told them to. Nancy and Jamie will go to Doctor Constantine for help, ditto. All in all, all things considered, fantastic!"

"Look at you beaming away," I said, smirking. "Everybody lives, Sammy! Everybody lives! I need more days like this," He said. "Doctor," I started. "Go on, ask me anything. I'm on fire," He said. "What about Jack?" I asked and he stopped to turn to look at me. "Why'd he say goodbye?"

He sighed, "Sam," He started, "To get the bomb away, it will still blow up." I frowned, "Yeah, but . . ." I trailed off, staring at him. I blinked and shook my head, "He's going to die isn't he?"

"Someone had to drive the ship. He is going to sacrifice himself to destroy the bomb," He said and I shook my head, "No, no, he can't," I protested, "Doctor you have to do something. Do something."

"I can't," He said. "Can't or won't?" I asked. "What do you want me to do?" He asked. "I don't know," I said, "Just get him out before he will die. Please." He sighed before turning back to the console and he pulled the lever.

"How about some music?" He asked before a song played. He stopped the TARDIS and snapped his fingers, making the doors of the TARDIS to open. I turned arounf to see we were in Jack's ship before I turned back to The Doctor.

"He's going to notice," He said as he walked over to me. He hold his hand out for me and I smiled before grabbing his hand. We started to dance and I looked over to see Jack looking over with a frown.

"Hurry up, man!" I called and Jack ran in the TARDIS. "Okay. And right and turn. Okay, okay, try and spin me again, but this time don't get my arm up my back. No extra points for a half-nelson," I told The Doctor before we stopped.

"I'm sure I used to know this stuff," He said before turning to Jack as he walked to the console, "Close the door, will you? Your ship's about to blow up. There's going to be a draught."

Jack shut the door as The Doctor started up the engine. "Welcome to the TARDIS," The Doctor said. "Much bigger on the inside," Jack commented. "You'd better be," The Doctor said and I walked up to Jack, "I think what The Doctor's trying to say is you may cut in," I said as I hold my hand to Jack with a smile. He smirked and grabbed my hand. "Sam!" The Doctor said and we looked back at him, "I've just remembered!"

"What?" I asked before the music suddenly changed. "I can dance! I can dance!" The Doctor said with a smile. "Actually, Doctor, I thought Jack might like this dance," I said. "I'm sure he would, Sam. I'm absolutely certain," He agreed, "But who with?"

He hold his hand to me again and I smiled before taking it. I danced with him while Jack watched with a smirk. This style The Doctor could do, and I loved it when he dipped me.